MODEL YEAR(S): 2005 DATE: 09/08/2005 REVISION DATE: PAGE: 1 of 41 ADVISORY

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1 UI BULLETIN # 74 SUBJECT: PTO Procedure for Tilt Cab Trucks with (7.8L) LG4 Engine MODELS AFFECTED: T-Series Medium Duty Truck (F6/F7/F8) (Chevrolet, GMC & Isuzu) MODEL YEAR(S): 2005 DATE: 09/08/2005 REVISION DATE: PAGE: 1 of 41 ADVISORY The LG4 Isuzu 7.8L Duramax diesel engine offers additional PTO capabilities to those included with the 6.6L diesel engine. These upfitter added features include remote PTO and throttle. Primary concerns to upfitters are: 1. The Medium Duty T-Series (Tilt Cab) has additional connectors to access these features compared to the C-Series, and 2. Programming is required to configure these enhanced capabilities. A TIS 2000 or a Tech 2 Programming Tool is required to make these changes. These tools are available at your GM dealer. Notes: The LG4 is the only engine offered on the Medium Duty T-Series. References to the TAC motor and module in the Description & Programming sections refer to other engines. The Programming Guide refers to configurations in the ECM and is not a how to guide for tool use. Referenced document ID# s are GM service documents available to your GM dealer. This Bulletin covers the following issues: 1. Basic PTO Description and Operation (document ID# ) 2. PTO Switch and Mounting 3. Electrical Schematics 4. Connector Pin-Outs and Locations 5. Option Programming Guide (document ID# )

2 TABLE OF CONTENTS Page # Description 3 Basic PTO Description and Operation (document ID# ) 4 Modes of Operation 4 PTO Preset Mode Factory Default Setting 4 PTO Preset Mode Function Table 5 PTO Variable Mode 5 PTO Variable Mode Function Table 6 Reprogramming the PCM/ECM for Fast Idle/PTO Using the Scan Tool 9 PTO Switch and Mounting 10 Electrical Schematics 10 PTO Switch and Relay 11 Remote PTO and Throttle Connectors 12 Connector Pin-Outs and Locations 12 Auto Cruise Switch/PTO Switch Diode 13 PTO Switch 13 PTO Relay 14 C103 Trans OPT LCT Transmission 15 C103 Trans OPT MD Transmission 16 C104 PTO Controls 17 C106 Remote PTO 18 C120 Remote Throttle 19 C106, C120, C103 Location 20 C104 Location 21 (LG4) Engine Control Module (ECM) Connector C-1 23 (LG4) Engine Control Module (ECM) Connector C-2 25 Option Programming Guide (document ID# ) 25 Stationary Preset PTO Mode 25 Factory Installed Hardware 26 Upfitter Installed Hardware 29 Stationary Variable PTO Mode 29 Factory Option 30 Upfitter Installed 33 Mobile Variable PTO Mode 33 Factory Option 34 Upfitter Installed 36 Fast Idle Mode 37 Cruise Control Options 38 Exhaust Brake Options 39 Vehicle Speed Limit Options 39 Gear Down Protection 40 Engine Idle Speed 40 High Idle Cold Engine Set Speed 41 Speed Axle Calibration bulletin 74 2 of 41 09/08/2005

3 1. Basic PTO Description and Operation (document ID# ) POWER TAKE-OFF (PTO) DESCRIPTION AND OPERATION Table 1: PTO Preset Mode Factory Default Setting Table 2: PTO Preset Mode Function Table Table 3: PTO Variable Mode Table 4: PTO Variable Mode Function Table Table 5: Reprogramming the PCM/ECM for Fast Idle/PTO The power take-off (PTO) is an upfitter integrated system that allows the user to create an auxiliary power source that will drive either a hydraulic pump or a generator. When the operator requests PTO the PTO switch will be turned ON and the engine RPM will go to a default standby speed. The PTO solenoid will engage if all of the engage conditions are met. If any of the PTO engage conditions for the specific operating mode are no longer valid, the engine controller will exit out of PTO mode. The PTO system is integrated with the cruise control and engine control system. The PTO system utilizes the following GM parts: The PTO enable switch The cruise control multi-function switch The PTO relay The powertrain control module (PCM) with 8.1L gasoline only The engine control module (ECM) with 6.6L or 7.8L diesel only The throttle actuator control (TAC) module with 8.1L gasoline only The TAC motor with 8.1L gasoline only The following parts are upfitter supplied and installed: The load engage switch The PTO solenoid Voltage is supplied with the ignition switch in RUN and START through the engine 1 fuse to the secondary side of the PTO relay and the PTO enable switch. When the PTO switch is turned ON, voltage will be present through the primary side of the PTO relay and at the PTO ON switch signal circuit at the PCM. If the PCM sees all of the PTO engage conditions it will provide a ground for the relay. Current will flow through the coil in the PTO relay and close the normally open contacts. This will allow current to flow to the load engage switch. When the operator closes the load engage switch current will flow to the PTO solenoid. If the PCM sees all of the PTO engage conditions the PCM will send a class 2 signal to the TAC module. The TAC module will use the TAC motor to increase the engine RPM to the standby speed. In the event that any of the PTO requirements are no longer met then the PCM will return the engine RPM to idle and turn the PTO solenoid OFF. For diesel applications, engine speed is controlled by the ECM and the fuel injection control module (FICM). bulletin 74 3 of 41 09/08/2005

4 Modes of Operation PTO Preset Mode Factory Default Setting The PTO preset mode is normally used for stationary applications. The PTO solenoid will remain engaged while mobile in the preset mode however PTO set and resume speed controls will be inoperative. The engine RPM will also return to normal. This mode provides a default standby speed that varies depending on the engine and transmission combination. This mode also provides 2 default PTO control speeds. Please note that the standby speed is not to be used as a PTO control speed. All vehicles that have the PTO option should be equipped with cruise control. PTO Preset Mode Factory Default Setting Table Programmable Factory Setting Parameters (RPM) Minimum Value (RPM) Maximum Value (RPM) PTO Max L L Engine Speed LB7/LG4-950 LB7/LG F2 Auto/F2 Manual/F3 Normal engine idle will override PTO Standby RPM L18-800/850/1200 if higher than requested PTO 1300 base idle LB7-850/850 PTO Set Speed All/L18 Fam 3 PTO Set speed cannot be set L18/LB7,LC8,LG4 1250/1400 below PTO Standby speed 4200/3100 PTO Resume L18/LB7,LC8,LG PTO Set Speed Speed 4200/3100 PTO Preset Mode Function The following chart shows how to toggle between the three PTO speeds through the SET and RESUME switches on the cruise control multifunction switch. PTO Preset Mode Function Table Present PTO State Pressing Resulting PTO State PTO Standby Speed SET PTO Set Speed PTO Standby Speed RESUME PTO Resume Speed PTO Set Speed SET PTO Standby Speed PTO Set Speed RESUME PTO Resume Speed PTO Resume Speed SET PTO Set Speed PTO Resume Speed RESUME PTO Standby Speed bulletin 74 4 of 41 09/08/2005

5 PTO Variable Mode This PTO speed control mode is used for both stationary and mobile applications. This mode allows PTO to be controlled in a fashion similar to cruise control. The operator is able to hold an engine RPM with the SET switch on the cruise stock. The operator can tap up to increase engine speed in 100 RPM increments with the RESUME switch. The operator may also tap down to decrease engine speed with the SET switch. Variable engine RPM may be obtained by holding either the SET or RESUME switch. PTO Variable Mode Table Programmable Factory Setting Parameters (RPM) Minimum Value (RPM) Maximum Value (RPM) PTO Max L L Engine Speed LB7/LG4-950 LB7/LG F2 Auto/F2 Manual/F3 Normal engine idle will override PTO Standby RPM L18-800/850/1200 if higher than requested PTO 1300 base idle LB7-850/850 PTO Variable Mode Function Table Switch Set Resume (w/cruise Only) Engine speed will decrease by 100 RPM Engine speed will increase by 100 RPM increments and will maintain new engine increments and will maintain new engine Pressed Once speed value. Engine speed can be decreased speed value. Engine speed can be increased down to PTO Standby RPM speed value, all up to the PTO max engine speed value, all further SET inputs will be ignored further RESUME inputs will be ignored Held Decelerates engine speed down to the PTO Increases engine speed up to the PTO max standby speed value engine speed value bulletin 74 5 of 41 09/08/2005

6 Reprogramming the PCM/ECM for Fast Idle/PTO Using the Scan Tool The scan tool must be used to enable the Fast Idle and PTO options and adjust the factory preset parameters to the desired settings. The scan tool menu driven device is a hand held scan tool that plugs into the datalink connector located underneath the dash near the driver s seat. Once the scan tool is connected, the following chart will guide the user. Reprogramming the PCM/ECM for Fast Idle/PTO Step Current Menu Select 1 Main F0: Diagnostics 2 Vehicle Identification Year of Vehicle 3 Vehicle Identification Medium Duty Truck 4 Vehicle Identification Make 5 Vehicle Identification Series 6 Powertrain Engine 7 Powertrain Automatic or Manual 8 Special Functions F3: PTO Options 9 Current PTO Settings Change Options 10 PTO Options Refer to the following information for the PTO options menu selections. To Adjust the Mode of Operation: The PTO options menu will appear with the selections: F0: Fast Idle Preset PTO Speed Control Variable PTO Speed Control Once the mode of operation is selected the Current PTO Settings menu will appear with the adjustable parameters for the current mode. This screen allows the user to increase or decrease engine RPM values using the INCREASE and DECREASE buttons. If the Engine Fault Shutdown feature is selected, the YES or NO Buttons will determine if this feature is enabled. Important Please be aware that UF3 and PTO high idle settings must be reprogrammed in the event that the PCM is replaced. It may be advisable to provide the PCM settings information to the customer in case the PCM requires servicing during some point in the life of the vehicle. bulletin 74 6 of 41 09/08/2005

7 After all the settings are adjusted, the user will press the REPROGRAM button and the Current PTO Settings menu will appear with the changes. The ignition must be turned OFF for 10 seconds to ensure that the program values are stored in the PCM. PTO Components PTO Switch The PTO switch is mounted in the left side of the instrument panel. The PTO switch has two positions, ON and OFF. When the PTO switch is in the ON position, voltage will be present on the PTO ON switch signal circuit at the relay and the PCM. The PTO indicator is an LED and is integral with the switch The indicator will illuminate when the switch is turned ON. The presence of the indicator being on does not mean that the PTO solenoid is engaged. The cruise control multi-function switch must be used in conjunction with the PTO switch. Illumination of the switch is provided through the dimming circuit. Cruise Control Multi-Function Switch Engine speed control of the PTO system must controlled by the function control switches located on the multifunction turn signal lever. The cruise control function control switches includes the ON/OFF, SET/COAST, and RESUME/ACCEL. The switch assembly provides driver control of the PTO as well as the cruise control system. The SET/COAST and RESUME/ACCEL switches may be used to increase and decrease engine RPM. See the chart above for recommended speeds. PTO Relay The PTO relay is located on the side of the underhood fuse block. Voltage is supplied with the ignition switch in RUN and START through the Engine 1 fuse to the secondary side of the PTO relay. The PTO switch controls the voltage to the primary side of the PTO relay while the PCM controls the ground. Load Engage Switch The load engage switch is an upfitter supplied and installed part. The switch is remote. Voltage is supplied by the PTO relay to the normally open contacts of the switch. When the switch is closed current will flow to the PTO solenoid. PTO Solenoid The solenoid is an upfitter supplied part and is replaceable on most PTOs. The PTO solenoid is used on clutch activated PTOs. The PTO relay supplies the solenoid with voltage when the relay is energized. bulletin 74 7 of 41 09/08/2005

8 PCM The PCM is the control center of the PTO system. Applications with a 6.6L or 7.8L diesel use an ECM. The PCM monitors numerous engine and vehicle functions. To engage the PTO, the PCM must see the following conditions: The engine must be running The transmission must be in PARK or NEUTRAL The park brake must be set for manual transmission only The vehicle speed must be zero in Preset Mode only The brake or clutch must not be depressed The PCM constantly looks at the information from various sensors and other inputs, and controls the systems that affect vehicle performance. The PCM also performs a diagnostic test on the electronic throttle control system. TAC Module The TAC module is the control center for the electronic throttle system. The TAC module and the PCM communicate through a dedicated redundant serial data circuit. The TAC module and the PCM monitor the commanded throttle position and compare the commanded position to the actual throttle position. This is accomplished by monitoring the APP and the throttle position (TP) sensor. These 2 values must be within a calibrated value of each other or a DTC may be set. The TAC module also monitors each individual circuit of the TP sensor and the APP to verify proper operation. The TAC module commands the TAC motor to increase or decrease the engine RPM. TAC Motor The TAC motor is part of the throttle body and controls the positions of the throttle. The motor is bi-directional and is controlled by the TAC module. The TAC motor increases or decreases the engine RPM. bulletin 74 8 of 41 09/08/2005

9 2. PTO Switch and Mounting POWER TAKE-OFF (PTO) COMPONENT VIEWS T-Series Medium Duty Truck F6/F7/F8 Instrument Panel Switches, Center Forward View (1) Outside Heated Mirror Switch (DNN) (2) High Idle Switch (UF3) or Power Take-Off (PTO) Switch (3) Exhaust Brake Switch (K40) (4) Rear Axle Driver Control Switch Two Speed (HPZ and Automatic Transmission) (5) Traction Control Switch (NW9) (6) Overdrive (OD) Defeat Switch (Allison LCT) (7) Marker Lamp Switch (JE4, RQ2, and U86, or JE4, and RQ3) bulletin 74 9 of 41 09/08/2005

10 3. Electrical Schematics PTO Switch and Relay bulletin of 41 09/08/2005

11 Remote PTO and Throttle Connectors bulletin of 41 09/08/2005

12 4. Connector Pin-Out and Location POWER TAKE-OFF (PTO) CONNECTOR END VIEWS Table 1: Auto Cruise Switch/PTO Switch Diode Table 2: PTO Switch Table 3: PTO Relay Auto Cruise Switch/PTO Switch Diode Connector Part Information Way F Yazaki (OG) Pin Wire Color Circuit No. Function A GY DF49 Cruise Control On Switch Signal B L-GN/D-BU DF62 Cruise Control/PTO On Switch Signal C L-GN WB08 PTO On Switch Signal bulletin of 41 09/08/2005

13 PTO Switch Connector Part Information Way F Yazaki (NA) Pin Wire Color Circuit No. Function 1 PK WB01 Ignition 1 Voltage 2 L-GN WB02 PTO On Switch Signal 3 L-GN WB03 PTO On Switch Signal 4 BK WY01 Ground 5 BK/RD WB04 Instrument Panel Lamps Dimming Control 6 BK WY02 Ground PTO Relay Connector Part Information Way Yazaki (BK) Pin Wire Color Circuit No. Function 30 PK WB08 Ignition 1 Voltage 85 L-GN WB02 PTO On Switch Signal 86 PU WB05 PTO Control 87 WH WB07 PTO Relay Output 87A Not Used bulletin of 41 09/08/2005

14 INLINE HARNESS CONNECTOR END VIEWS Document ID# (Tables 3, 4, 5 & 7) 2005 T-Series Medium Duty Truck F6/F7/F8 Table 3: C103 (Upfitter TRANS OPT Connector) Front Chassis Harness to Upfitter Supplied Harness (Allison LCT Automatic Transmission) Table 4: C103 (Upfitter TRANS OPT Connector) Front Chassis Harness to Upfitter Supplied Harness (Allison MD Automatic Transmission) Table 5: C104 (Upfitter PTO Connector) Front Chassis Harness to Upfitter Supplied PTO Controls Harness (PTO) Table 7: C106 Front Chassis Harness to Upfitter Supplied Remote PTO Harness (PTO) C103 (Upfitter TRANS OPT Connector) Front Chassis Harness to Upfitter Supplied Harness (Allison LCT Automatic Transmission) Connector Part Connector Part 10-Way F Metri-Pack Way M Metri-Pack 150 Information Information Series, Sealed (BK) Series, Sealed (BK) Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function A PU OA24 Engine Brake Enable Signal A Upfitter Usage B YE OA23 A/T Neutral Signal B Upfitter Usage C WH OA20 PTO Engaged Signal C Upfitter Usage D Not Used D Upfitter Usage E Not Used E Upfitter Usage F BN OA21 Transmission Shift Inhibit Signal F Upfitter Usage G Not Used G Upfitter Usage H BK OA25 Low Reference H Upfitter Usage J Not Used J Upfitter Usage K D-BU OA26 Transmission Power Take-Off Enable Signal K Upfitter Usage bulletin of 41 09/08/2005

15 C103 (Upfitter TRANS OPT Connector) Front Chassis Harness to Upfitter Supplied Harness (Allison MD Automatic Transmission) Connector Part Connector Part 10-Way F Metri-Pack Way M Metri-Pack 150 Information Information Series, Sealed (BK) Series, Sealed (BK) Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function A PU NF52 Engine Brake Enable Signal A Upfitter Usage B YE NF53 A/T Neutral Signal B Upfitter Usage C WH NF62 PTO Enable Signal C Upfitter Usage D YE NF51 Transmission Auxiliary Hold Signal D Upfitter Usage E GY NF50 Transmission Shift Inhibit Signal E Upfitter Usage F BN NF48 Transmission Shift Inhibit Signal F Upfitter Usage G Not Used G Upfitter Usage H BK NF49 Low Reference H Upfitter Usage J BK NF54 Low Reference J Upfitter Usage K Not Used K Upfitter Usage bulletin of 41 09/08/2005

16 C104 (Upfitter PTO Connector) Front Chassis Harness to Upfitter Supplied PTO Controls Harness (PTO) Connector Part Connector Part 10-Way F GT 150 Series, 10-Way M Metri-Pack 150 Information Information Sealed (BK) Series, Sealed (BK) Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function A Not Used A Upfitter Usage B L-GN WB12 PTO Disable Signal B Upfitter Usage C WH WB07 PTO On Switch Signal C Upfitter Usage D BK WY03 Ground D Upfitter Usage E-F Not Used E-F Upfitter Usage G D-BU/RD WB11 PTO Status Signal G Upfitter Usage H WH WB10 PTO Relay Output H Upfitter Usage J-K Not Used J-K Upfitter Usage bulletin of 41 09/08/2005

17 C106 Front Chassis Harness to Upfitter Supplied Remote PTO Harness (PTO) Connector Part Connector Part 6-Way F Sumitomo, Information 6-Way F Sumitomo, Sealed (BN) Information Sealed (BN) Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function A BK/YE DF05 PTO Set Switch Signal Remote A Upfitter Usage B WH/RD DF06 PTO Resume Switch Signal Remote B Upfitter Usage C D-GN/WH DF07 PTO Set Switch Signal B Remote C Upfitter Usage D RD/BK DF08 PTO Disable Switch Signal Remote D Upfitter Usage E BK/WH DF09 PTO Set Switch Signal A Remote E Upfitter Usage F BK CU05 Ground F Upfitter Usage bulletin of 41 09/08/2005

18 C120 Front Chassis Harness to Upfitter PTO Throttle Position Sensor Harness (PTO) Connector Part Connector Part 4-Way M Sumitomo, Information 4-Way F Sumitomo, Sealed (D-GY) Information Sealed (D-GY) Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function 1 L-BU/WH DF22 5-Volt Reference 1 Upfitter Usage 2 L-BU/RD DF23 PTO Accel Switch Signal 2 Upfitter Usage 3 L-BU/YE DF24 Low Reference 3 Upfitter Usage 4 Not Used 4 Upfitter Usage bulletin of 41 09/08/2005

19 DOCUMENT ID# (FIGURE 1) 2005 T-Series Medium Duty Truck F6/F7/F8 Inboard Left Frame Rail, Forward of #2 Crossmember (1) Front Chassis Harness (2) C106 (6 Cavities Upfitter Remote PTO Connector PTO) (3) C120 (4 Cavities Upfitter PTO Throttle Position Sensor Connector PTO) (4) C100 (12 Cavities Upfitter AUX WRG Connector) (5) C103 (10 Cavities Upfitter TRANS OPT Connector A/T) (6) Lower Left Frame Rail bulletin of 41 09/08/2005

20 DOCUMENT ID# (FIGURE 2) 2005 T-Series Medium Duty Truck F6/F7/F8 Inboard Left Frame Rail, Rear of the Spring Perch (1) Engine Bell Housing (2) C104 (10 cavities Upfitter PTO Connector) (3) Front Chassis Harness (4) Left Frame Rail (5) Left Rear Spring Perch bulletin of 41 09/08/2005

21 Engine Control Module (ECM) C-1 Connector Part Information: Way F Bosch (BK) Pin Wire Circuit Color No. Function 1 BK CU15 Ground 2 BK CU09 Ground 3 BK CU10 Ground 4 BK CU13 Ground 5 BK CU14 Ground 6 Not Used 7 TN CF13 Low Reference 8 VT CF16 Low Reference 9 RD CF19 Low Reference 10 L-BU/YE DF24 Low Reference 11 Not Used 12 BK/YE CF96 Low Reference 13 Not Used 14 GY OA19 Ground (Allison LCT) BK/YE DF41 Drain Wire (M/T) 15 Not Used 16 TN CF10 Shield 17 WH/RD CF36 SAE J1939 Serial Data Bus+ 18 L-GN/RD CF37 SAE J1939 Serial Data Bus 19 Not Used 20 D-GN CF34 ECM Class 2 Serial Data A 21 Not Used 22 PK DF55 Ignition 0 Voltage Pin Wire Circuit Color No. Function 23 PK CF10 Ignition 1 Voltage Not Used 26 BK CU11 Ground 27 BK CU12 Ground 28 WH CF22 Engine Speed Signal Not Used 31 L-BU CF12 APP Sensor 1 Signal 32 L-GN CF15 APP Sensor 2 Signal 33 D-GN CF18 APP Sensor 3 Signal 34 L-BU/RD DF22 PTO Accel Switch Signal Not Used 37 VT CF97 Fuel Level Signal Primary 38 L-BU CF99 Fuel Level Signal Secondary WH OA16 VSS High Signal (Allison LCT) 39 WH DF38 Signal High Rear (Manual Trans.) Not Used (Allison MD) 40 BK DF39 Signal Low Rear (Manual Trans.) Not Used (Automatic Trans.) 41 RD/BK DF59 Generator Field Duty Cycle Signal 42 Not Used 43 RD/D-BU DF56 Shift Motor Relay Control (HPZ) Not Used (w/o HPZ) Not Used (continued on next page) bulletin of 41 09/08/2005

22 Engine Control Module (ECM) C-1 (continued) Pin Wire Circuit Color No. Function 46 RD/BK DF50 Cruise Control On Switch Signal 47 RD DF48 Cruise Control Resume/Accel Switch Signal 48 L-BU DF47 Cruise Control Set/Coast Switch Signal 49 BK CF04 Ignition 1 Voltage 50 BK/RD CF05 Ignition 1 Voltage 51 L-BU/OG CF08 Battery Positive Voltage 52 WH CF06 ECM Power Enable Signal 53 WH CF07 ECM Power Enable Signal 54 WH/BK CF11 5-Volt Reference 55 BK/WH CF14 5-Volt Reference 56 YE/BK CF17 5-Volt Reference 57 Not Used 58 L-BU/WH DF22 5-Volt Reference Not Used 61 RD DF60 Charge Indicator Control 62 WH DF43 Stop Lamp Switch Signal (JE3) WH DF46 Stop Lamp Switch Signal (JE4) 63 RD/D-BU DF45 TCC Brake Switch/Cruise Control Release Signal 64 BK/OG CF29 CPP Switch Signal (Manual Trans.) Not Used (Automatic Trans.) Not Used 67 WH CF32 Exhaust Brake Request Signal 68 D-GN CF24 High Idle Switch Signal 69 Not Used Pin Wire Circuit Color No. Function 70 L-GN DF61 Coolant Level Switch Signal 71 L-GN BA03 Backup Lamp Supply Voltage Not Used 74 YE HB04 Glow Plug Relay Control 75 VT WB05 PTO Control 76 YE DF58 Starter Relay Coil Control 77 VT DF44 Exhaust Brake Relay Control 78 RD CF26 High Idle Indicator Control 79 L-BU CF21 Wait to Start Indicator Control 80 BK/WH CF20 MIL Control 81 D-GN/WH CF23 Vehicle Speed Signal 82 WH/BK DF57 Vehicle Speed Signal Not Used 86 WH/BK DF01 Brake/Clutch Switch Override Signal 87 Not Used 88 RD/BK DF02 PTO Disable Switch Signal Cab 89 BK/WH DF04 PTO Set Switch Signal A 90 D-GN/WH DF03 PTO Set Switch Signal B 91 BK/YE DF05 PTO Set Switch Signal Remote 92 WH/RD DF06 PTO Resume Switch Signal Remote 93 L-GN WB09 PTO On Switch Signal 94 L-GN WB12 PTO Engine Kill Signal 95 L-BU/RD WB11 PTO Engage Signal 96 YE CF35 PNP/Clutch Start Switch Signal bulletin of 41 09/08/2005

23 Engine Control Module (ECM) C-2 Connector Part Information: Way F Bosch (BK) Pin Wire Circuit Color No. Function Turbocharger Vane Position 1 BK B1 Control Solenoid Valve High Control 2 Not Used 3 WH B3 Injector Positive Voltage Control 1 4 RD B4 Injector Positive Voltage Control 2 5 WH B5 Injector Positive Voltage Control 1 6 RD B6 Injector Positive Voltage Control 2 7 BK/WH B7 EGR Motor U Supply Voltage 8 L-GN B8 EGR Motor V Supply Voltage 9 RD/YE B9 EGR Motor W Supply Voltage 10 Not Used 11 BK B11 Not Used 12 BK B12A Low Reference 13 BK B13A Low Reference 14 BK/YE B14 Low Reference 15 GY B15A Low Reference 16 BK B16A Low Reference 17 WH/BK B17 Ground 18 BK B18A Drain Wire 19 GY B19 Drain Wire 20 RD B20 SCV Low Signal 21 RD B21 SCV Low Signal Pin Wire Circuit Color No. Function 22 Not Used 23 RD B23 Not Used 24 WH B24 MAP Sensor Signal 25 WH B25A Fuel Pressure Sensor Signal 26 WH B26 Fuel Pressure Sensor Signal 27 GY B27 Oil Pressure Sensor Signal 28 WH B28 MAF Sensor Signal 29 WH B29 Turbocharger Vane Position Signal 30 WH B30 CMP Sensor Low 31 WH B31 CKP Sensor High 32 BK B32 CKP Sensor Low 33 WH B33 SCV High Signal 34 WH B34 SCV High Signal 35 D-BU/WH B35 ECT Sensor Signal 36 Not Used 37 L-GN/WH B37 IAT Sensor Signal 38 D-BU/RD B38 EGR Motor Position U Signal 39 WH/RD B39 EGR Motor Position V Signal 40 YE/RD B40 EGR Motor Position W Signal 41 YE B41 Fuel Temperature Sensor Signal 42 RD B42 Low Reference 43 RD B43 Fuel Injector 6 Control (continued on next page) bulletin of 41 09/08/2005

24 Engine Control Module (ECM) C-2 (continued) Pin Wire Circuit Color No. Function 44 BK B44 Fuel Injector 4 Control 44 BK B44 Fuel Injector 4 Control 45 BK/RD B45 Fuel Injector 5 Control 46 RD B46 5-Volt Reference 47 RD B47 5-Volt Reference 48 WH B48 5-Volt Reference 49 WH B49 5-Volt Reference Pin Wire Circuit Color No. Function 50 RD B50 5-Volt Reference 51 RD B51 5-Volt Reference 52 L-GN B52 Oil Level Switch Signal Not Used 56 WH B56 Fuel Injector 3 Control 57 L-BU B57 Fuel Injector 2 Control 58 YE B58 Fuel Injector 1 Control bulletin of 41 09/08/2005

25 5. Option Programming Guide (document ID# ) OPTION PROGRAMMING Power Take-Off (PTO) System PTO Option Programming The PTO Option Programming must be done when any of the following procedures are performed: When the upfitter installs a PTO system When the ECM is replaced When a change of the PTO setting is needed PTO Control System Description Refer to Power Take-Off (PTO) Description and Operation. Stationary Preset PTO Mode Important: If the engine speed the driver requests by pressing on the accelerator pedal is higher than the PTO desired engine speed, the accelerator pedal engine speed is used. In Stationary Preset PTO mode, the PTO control is performed while the vehicle is stopped by arbitrarily selecting one of multiple preset, up to four not including PTO base idle speed, engine speeds as the PTO desired engine speed. Hardware Configuration Factory Installed PTO Switch Important: The PTO base idle speed can change within the following allowable range: Minimum 600 RPM Maximum 1200 RPM Preset value 1000 RPM Important: The PTO maximum engine speed can change within the following allowable range: Minimum 1000 RPM Maximum 2550 RPM Preset value 2400 RPM The factory-option dash mounted PTO switch is used to enable or cancel the PTO mode. The engine speed will be set to the PTO base idle speed when the PTO switch is pressed. The switch is a pushlock type switch. The input circuit is connected to the ECM 93 of C-1 connector. bulletin of 41 09/08/2005

26 Cruise Set/Coast Switch Important: The PTO Set speed can change within the following allowable range: Minimum PTO Base Idle Speed Maximum PTO Maximum Engine Speed Preset value 1400 RPM Important: The PTO Set speed cannot be higher than the PTO Resume speed. The PTO Resume speed cannot be higher than the PTO Maximum Engine speed. The factory-installed combination switch mounted Cruise Set/Coast switch can be used in PTO mode to set the PTO Set speed, one fixed engine speed, when this switch is pressed. The switch is a momentary switch. The input circuit is connected to the ECM 48 of C-1 connector. Cruise Resume/Accel. Switch Important: The PTO Resume Speed can change within the following allowable range: Minimum PTO Base Idle Speed Maximum PTO Maximum Engine Speed Preset value 1700 RPM Important: The PTO Resume Speed cannot be lower than the PTO Set Speed. The PTO Resume Speed cannot be higher than the PTO Maximum Engine Speed. The factory-installed combination switch mounted Cruise Resume/Accel. switch can be used in PTO mode to set the PTO Resume Speed, another fixed engine speed, when this switch is operated. The switch is a momentary switch. The input circuit is connected to the ECM 47 of C-1 connector. Hardware Configuration Upfitter Installed Remote PTO Set Switch Important: The Remote PTO Set switch engine speed uses the PTO Set Speed value. The Remote PTO Set switch must be enabled, programmed, in the ECM. The upfitter-installed Remote PTO Set switch can be used in PTO mode to set the Remote PTO Set switch, the same engine speed as the PTO Set Speed, when this switch is pressed. The function of this switch is the same as the Cruise Set/Coast switch in the cab. The switch needs to be a momentary switch. The upfitter PTO connector is equipped with an input circuit to the ECM 91 of C-1 connector through the A of C106 connector. bulletin of 41 09/08/2005

27 Remote PTO Resume Switch Important: The Remote PTO Set switch engine speed uses the PTO Resume Speed value. The Remote PTO Set switch must be enabled, programmed, in the ECM. The upfitter-installed Remote PTO Resume switch can be used in PTO mode to set the Remote PTO Resume switch, the same engine speed as the PTO Resume Speed, when this switch is pressed. The function of this switch is the same as the Cruise Resume/Accel. switch in the cab. The switch needs to be a momentary switch. The upfitter PTO connector is equipped with an input circuit to the ECM 92 of C-1 connector through the B of C106 connector. Remote Set Speed A Switch Important: The Remote Set Speed A/B switches engine speed can change within the following allowable range: Minimum PTO base idle speed Maximum PTO maximum engine speed Preset value 1400 RPM Important: The Remote Set Speed A switch must be enabled, programmed, in the ECM. The upfitter-installed Remote Set Speed A switch can be used in PTO mode to set the PTO Set Speed A when this switch is pressed. The switch needs to be a momentary switch. The upfitter PTO connector is equipped with an input circuit to the ECM 89 of C-1 connector through the D of C106 connector. Remote Set Speed B Switch Important: The Remote Set Speed A/B switches engine speed can change within the following allowable range: Minimum PTO base idle speed Maximum PTO maximum engine speed Preset value 1700 RPM Important: The Remote Set Speed B switch must be enabled, programmed, in the ECM. The upfitter-installed Remote Set Speed B switch can be used in PTO mode to set the PTO Set Speed B when this switch is pressed. The switch needs to be a momentary switch. The upfitter PTO connector equipped with an input circuit to the ECM 90 of C-1 connector through C of C209 connector. bulletin of 41 09/08/2005

28 PTO Engage Relay Important: The PTO Engage Relay turn ON, ECM grounding coil control circuit, engine speed can change within the following allowable range: Minimum PTO Base Idle Speed Maximum PTO Maximum Engine Speed Preset value 1050 RPM Important: The PTO Engage Relay turn ON engine speed cannot be higher than any PTO speed except the PTO base idle speed. The PTO Engage Relay must be enabled and programmed in the ECM. The upfitter-installed PTO Enable Relay can be used to supply switched battery voltage to operate a PTO hydraulic solenoid. The solenoid in turn allows fluid to flow to a PTO hydraulic pump. The relay is controlled via the ECM grounding the relay coil control circuit. The input circuit is connected to the ECM 75 of C-1 connector. PTO Feedback Switch Important: PTO Feedback input to the ECM can be set via ECM programming. The preset is No or Disabled. Some applications require that the operator press an upfitter installed momentary switch, usually located outside the cab, before entering any PTO set speed, not PTO base idle speed. The switch is normally tied into the PTO Engage Relay switch circuit. Once the switch is pressed with the relay turned ON, the ECM should detect a high voltage at the PTO Feedback switch input. This momentarily high input will allow the operator to use any of the PTO speeds above the PTO base idle speed until the PTO mode is cancelled. The upfitter PTO connector is equipped with an input circuit to the ECM 95 of C-1 connector through G of C104 connector. PTO Engine Shutdown Switch Important: The time preceding the engine shutdown once the input has been received can be set within the following allowable range for: PTO Engine Shutdown Time Delay: Minimum 0 seconds Maximum 255 seconds Preset value 0 seconds Important: The PTO Engine Shutdown must be enabled, programmed, in the ECM, AND the ECM must detect a low voltage input at pin 94 of C-1 connector. These are both necessary for this shutdown feature to operate. The upfitter-installed PTO Engine Shutdown switch can be used in PTO mode to turn Off the engine. The switch needs to be a momentary switch. The upfitter PTO connector equipped with an input circuit to the ECM 94 of C-1 connector through the B of C104 connector. bulletin of 41 09/08/2005

29 Stationary Variable PTO Mode Important: In Stationary Variable PTO mode, the PTO control is performed while the vehicle is stopped by arbitrarily selecting engine speed as the PTO desired engine speed. Hardware Configuration The Stationary Variable PTO mode is enabled based on the following hardware inputs to the ECM: Factory-option PTO Switch Important: The PTO Base Idle Speed can change within the following allowable range: Minimum 600 RPM Maximum 1200 RPM Preset value 1000 RPM Important: The PTO Maximum Engine Speed can change within the following allowable range: Minimum 1000 RPM Maximum 2550 RPM Preset value 2400 RPM The factory-option dash mounted PTO Switch is used to enable or cancel PTO mode. The engine speed will be set to the PTO base idle speed when the PTO switch is pressed. The switch is a pushlock type switch. The input circuit is connected to the ECM 93 of C-1 connector. Cruise Set/Coast Switch Important: The PTO Decreased RPM Rate, decrement by a pressing, can change within the following allowable range: Minimum 0 RPM Maximum 1000 RPM Preset value 25 RPM The factory-installed combination switch mounted Cruise Set/Coast Switch can be used in PTO mode to decrease the engine speed when this switch is tapped or while this switch is pressed. The switch is a momentary switch. The input circuit is connected to the ECM 48 of C-1 connector. bulletin of 41 09/08/2005

30 Cruise Resume/Accel. Switch Important: The PTO Resume/Accel. Switch Increase RPM rate, increment by a tapping, uses the PTO Increase RPM Rate value. The PTO Increase RPM Rate, increment by a pressing, can change within the following allowable range: Minimum 0 RPM Maximum 1000 RPM Preset value 25 RPM The factory-installed combination switch mounted Cruise Resume/Accel. Switch can be used in PTO mode to increase the engine speed when this switch is tapped or while this switch is operating. The switch is a momentary switch. The input circuit is connected to the ECM 47 of C-1 connector. Upfitter-installed Remote PTO Set Switch Important: The Remote PTO Set switch Decrease RPM rate, decrement by a tapping, uses the PTO Decrease RPM Rate value. The Remote PTO Set switch must be enabled, programmed, in the ECM. The upfitter-installed Remote PTO Set switch can be used in PTO mode to decrease the engine speed when this switch is tapped or while this switch is pressed. The function of this switch is same as the Cruise Set/Coast switch in the cab. The switch needs to be a momentary switch. The upfitter PTO connector equipped with an input circuit to the ECM 91 of C-1 connector through the A of C106 connector. Remote PTO Resume Switch Important: The Remote PTO Resume switch Increase RPM rate, increment by a tapping, uses the PTO Increase RPM Rate value. The Remote PTO Resume switch increase ramp rate, increment by a pressing, uses the PTO Increase Ramp RPM Rate value. The Remote PTO Resume switch must be enabled, programmed, in the ECM. The upfitter-installed Remote PTO Resume switch can be used in PTO mode to increase the engine speed hen this switch is tapped or while this switch is pressed. The function of this switch is same as the Cruise Resume/Accel. switch in the cab. The switch needs to be a momentary switch. The upfitter PTO connector equipped with an input circuit to the ECM 92 of C-1 connector through the B of C106 connector. bulletin of 41 09/08/2005

31 Remote PTO Accelerator Sensor Important: The PTO engine speed control range by the sensor can control within the following allowable range: Minimum PTO Base Idle Speed Maximum Remote PTO Throttle Maximum Engine Speed Preset value 1000 RPM It is necessary to program the Remote PTO Accelerator Sensor signal volume inputs to the ECM at position 0 percent and 100 percent. Preset value at 0 percent: 1 volts Preset value at 100 percent: 4 volts If the ECM detects that the Remote PTO Throttle sensor signal is more than 4.9 volts, DTC P2005 will set. The Remote PTO Throttle Sensor must be enabled, programmed, in the ECM. The upfitter-installed Remote PTO Accelerator sensor can be used in PTO mode to increase or decrease the engine speed while this sensor is operating. The sensor needs to be a potentiometer. The ECM supplies 5 volts reference circuit to the Remote PTO throttle sensor from the ECM 58 of C-1 connector through the 1 of C120 connector. The ECM also provides a ground on the low reference circuit from the ECM 10 of C-1 connector through the 3 of C120 connector. The ECM monitors the sensor signal on the ECM 34 of JC-1 connector through the 2 of C120 connector. PTO Engage Relay Important: The PTO Enable Relay turn ON, ECM grounding coil control circuit, engine speed can change within the following allowable range: Minimum PTO Base Idle Speed Maximum PTO Maximum Engine Speed Preset value 1050 RPM The PTO Engage Relay turn ON engine speed cannot be higher than any PTO speed except the PTO base idle speed. The PTO Engage Relay must be enabled and programmed in the ECM. The upfitter-installed PTO Engage Relay can be used to supply switched battery voltage to operate a PTO hydraulic solenoid. The solenoid in turn allows fluid to flow to a PTO hydraulic pump. The relay is controlled via the ECM grounding the relay coil control circuit. The input circuit is connected to the ECM 75 of C-1 connector. bulletin of 41 09/08/2005

32 PTO Feedback Switch Important: PTO Feedback input to the ECM can be set via ECM programming. The preset is No or Disabled. Some applications require that the operator press an upfitter installed momentary switch usually located outside the cab before entering any PTO set speed, not PTO Base Idle Speed. The switch is normally tied into the PTO Engage Relay switch circuit. Once the switch is pressed with the relay turned ON, the ECM should detect a high voltage at the PTO Feedback Switch input. This momentarily high input will allow the operator to use any of the PTO speeds above the PTO Base Idle Speed until PTO mode is cancelled. The upfitter PTO connector is equipped with an input circuit to the ECM 95 of C-1 connector through G of C104 connector. PTO Engine Shutdown Switch Important: The time preceding the engine shutdown once the input has been received can be set within the following allowable range: PTO Engine Shutdown Time Delay: Minimum 0 seconds Maximum 255 seconds Preset value 0 seconds PTO Engine Shutdown must be enabled, programmed, in the ECM, AND the ECM must detect a low voltage input at pin 94 of C-1 connector. These both are necessary for this shutdown feature to operate. The upfitter-installed PTO Engine Shutdown switch can be used in PTO mode to turn OFF the engine. The switch needs to be a momentary switch. The upfitter PTO connector equipped with an input circuit to the ECM 94 of C-1 connector through the B of C104 connector. bulletin of 41 09/08/2005

33 Mobile Variable PTO Mode Important: If the engine speed the driver requests by pressing on the accelerator pedal is higher than the PTO desired engine speed, the accelerator pedal engine speed is used. The PTO Maximum Vehicle Speed for Mobile Variable PTO mode can change within the following allowable range: Minimum 0 km/h (0 mph) Maximum 113 km/h (70 mph) Preset value 40 km/h (25 mph) When a Maximum Vehicle Speed value is set, the vehicle will not exceed this value in PTO mode, even if the PTO Maximum Vehicle Speed is higher. In Mobile Variable PTO mode, the PTO control is performed while the vehicle is running by arbitrarily selecting engine speeds as the PTO desired engine speed. The system allows increases or decreases the PTO base idle speed by two switch inputs into the ECM while the vehicle is running. Hardware Configuration Mobile Variable mode uses only switches in the cab, and is enabled based on the following hardware inputs to the ECM: Factory-option PTO Switch Important: The PTO base idle speed can change within the following allowable range: Minimum 600 RPM Maximum 1200 RPM Preset value 1000 RPM The PTO maximum engine speed can change within the following allowable range: Minimum 1000 RPM Maximum 2550 RPM Preset value 2400 RPM The factory-option dash mounted PTO switch is used to enable or cancel the PTO mode. The engine speed will be set to the PTO base idle speed when the PTO switch is pressed. The switch is a pushlock type switch. The input circuit is connected to the ECM 93 of C-1 connector. bulletin of 41 09/08/2005

34 Cruise Set/Coast Switch Important: The PTO Decrease RPM Ramp Rate, decrement by a pressing, can change within the following allowable range: Minimum 0 RPM Maximum 1000 RPM Preset value 25 RPM The factory-installed combination switch mounted Cruise Set/Coast switch can be used in PTO mode to decrease the engine speed when this switch is tapped or while this switch is pressing. The switch is a momentary switch. The input circuit is connected to the ECM 48 of C-1 connector. Cruise Resume/Accel. Switch Important: The PTO Resume/Accel. switch increase RPM rate, decrement by a tapping, uses the PTO Tap Bump Rate value. The PTO Increase Ramp RPM Rate, increment by a pressing, can change within the following allowable range: Minimum 0 RPM Maximum 1000 RPM Preset value 25 RPM The factory-installed combination switch mounted Cruise Resume/Accel. switch can be used in PTO mode to increase the engine speed when this switch is tapped or while this switch is pressed. The switch is a momentary switch. The input circuit is connected to the ECM 47 of C-1 connector. Upfitter-installed PTO Engage Relay Important: The PTO Engage Relay turn ON, ECM, grounding coil control circuit, engine speed can change within the following allowable range: Minimum PTO Base Idle Speed Maximum PTO Maximum Idle Speed Preset value 1050 RPM The PTO Engage Relay turn ON engine speed cannot be higher than any PTO speed except the PTO base idle speed. The upfitter-installed PTO Engage Relay can be used to supply switched battery voltage to operate a PTO hydraulic solenoid. The solenoid in turn allows fluid to flow to a PTO hydraulic pump. The relay is controlled via the ECM grounding the relay coil control circuit. The input circuit is connected to the ECM 75 of C-1 connector. bulletin of 41 09/08/2005

35 PTO Feedback Switch Important: PTO Feedback input to the ECM can be set via ECM programming. The preset is No or Disabled. Some applications require that the operator press an upfitter installed momentary switch, usually located outside the cab, before entering any PTO set speed, not PTO base idle speed. The switch is normally tied into the PTO Engage Relay switch circuit. Once the switch is pressed with the relay turned ON, the ECM should detect a high voltage at the PTO Feedback switch input. This momentarily high input will allow the operator to use any of the PTO speeds above the PTO base idle speed until the PTO mode is cancelled. The upfitter PTO connector is equipped with a voltage feed circuit to the PTO Engage Relay. Also, the upfitter PTO connector is equipped with an input circuit to the ECM 95 of C-1 connector through G of C104 connector. PTO Engine Shutdown Switch Important: The vehicle speed preceding the Engine Shutdown Time Delay once input has been received must be 0 km/h (0 mph) or the engine will not shut down. The time preceding the engine shutdown once the input has been received can be set within the following allowable range: PTO Engine Shutdown Time Delay: Minimum 0 seconds Maximum 255 seconds Preset value 0 seconds PTO Engine Shutdown must be enabled, programmed, in the ECM AND the ECM must detect a low voltage input at pin 94 of C-1 connector. These both are necessary for this shutdown feature to operate. The upfitter-installed PTO Engine Shutdown Switch can be used in PTO mode to turn Off the engine. The switch needs to be a momentary switch. The upfitter PTO connector equipped with an input circuit to the ECM 94 of C-1 connector through the B of C104 connector. bulletin of 41 09/08/2005

36 Fast Idle Mode In Fast Idle mode, the engine idle speed control is performed while the vehicle is stopped by turning on the high idle switch. There is only one preset engine speed for the function. Also, the ECM will only allow one of the following to be enabled at a time: Fast Idle Mode Stationary Preset PTO Mode Stationary Variable PTO Mode Mobile Variable PTO Mode Hardware Configuration The Fast Idle mode is enabled based on the following hardware inputs to the ECM: Factory-option High Idle Switch Important: The Fast Idle Set Speed can change within the following allowable range: Minimum 600 RPM Maximum 2550 RPM Preset value 1000 RPM The Fast Idle function must be enabled, programmed, in the ECM. The PTO modes are disabled in the ECM when Fast Idle mode is enabled. The factory-installed option dash mounted High Idle switch can be used in Fast Idle mode to enable the Fast Idle Set Speed, one fixed engine speed, when this switch is pressed. The switch is a momentary switch. The input circuit is connected to the ECM 68 of C-1 connector. bulletin of 41 09/08/2005

37 Cruise Control System Cruise Control Options Programming The Cruise Control Option Programming must be done when any of the following procedures are performed: When the ECM is replaced When change of the minimum cruise control speed is needed When change of the maximum cruise control speed is needed When the exhaust brake control assist is needed in cruise control The operational speed range of the cruise control system can be changed within the following allowable range: Minimum 30 km/h (19 mph) Maximum 120 km/h (75 mph) The cruise control system can be programmed to utilize the exhaust brake to help maintain vehicle speed. The ECM default for this option is set to No. This exhaust brake assist in cruise control is enabled when the following conditions are met: The exhaust brake in cruise mode is programmed. The exhaust brake request switch is ON. Cruise control mode is active. The accelerator pedal is not pressed. The actual vehicle speed is higher than the Cruise set speed. This exhaust brake assist in cruise is disabled when one of the following conditions are met: The exhaust brake in cruise mode is not programmed. The exhaust brake request switch is OFF. Cruise control mode is disabled. The accelerator pedal is pressed. The actual vehicle speed is less than the Cruise set speed. The cruise control system can be programmed for relaxed cruise control. This option allows the ECM to control the vehicle speed within ±8 km/h (5 mph) of the cruise set speed for smoother operation. The ECM default for this option is Off. bulletin of 41 09/08/2005

38 Exhaust Brake System Exhaust Brake Options Programming The Exhaust Brake Option Programming must be done when any of the following procedures are performed: When the ECM is replaced. When a change of the exhaust brake setting is needed. When a change of the exhaust brake assist in cruise control is needed. Refer to Cruise Control System. The ECM has the functionality to accommodate one of three different exhaust brake systems. These systems consist of the following: Manual Mode Coast Mode Latch Mode Manual Mode This exhaust brake control is active when the following conditions are met: The exhaust brake switch is ON. The accelerator pedal is fully released. Coast Mode This exhaust brake control is active when the following conditions are met: The exhaust brake switch is ON. The accelerator pedal is fully released. The brake pedal is depressed. Latch Mode This exhaust brake control is active when the following conditions are met: The exhaust brake switch is ON. The accelerator pedal is fully released. The brake pedal is operating and exhaust brake control continues after releasing. When the engine speed reaches a set point speed, the exhaust brake becomes inactive. bulletin of 41 09/08/2005

39 Vehicle Speed Limit System Vehicle Speed Limit Options Programming The Vehicle Speed Limit Option Programming must be done when any of the following procedures are performed: The ECM is replaced. The top vehicle speed limit is changed. The maximum vehicle speed can be changed within the following allowable range: Minimum 0 km/h (0 mph) Maximum 118 km/h (74 mph) Gear Down Protection System Gear Down Protection Options Programming The Gear Down Protection Option Programming must be done when any of the following procedures are performed: When the ECM is replaced. When a change of the Gear Down Protection setting is needed. Gear Down Protection Active Vehicle Speed The Gear Down Protection active vehicle speed can change by request of a user within the following allowable range: Minimum 48 km/h (30 mph) Maximum 120 km/h (75 mph) Preset Value 75 km/h (45 mph) Gear Down Protection RPM Limit The Gear Down Protection RPM limit can change within the following allowable range: Minimum 1700 RPM Maximum 2550 RPM Preset Value 1700 RPM bulletin of 41 09/08/2005

40 Engine Idle Speed Programming Engine Idle Speed Programming The Idle Engine Speed Option Programming must be done when any of the following procedures are performed: When the ECM is replaced. When change of the Idle Engine Speed setting is needed. Normal Idle Engine Speed Set The Base Idle Speed can change within the following allowable range: Minimum 600 RPM Maximum 700 RPM Preset Value 600 RPM High Idle Cold Engine Speed Set The ECM has the capability to add a preset RPM on top of the normal idle engine speed at any temperature below 0 C (32 F) to aid in engine warm-up. This function is already programmed into the ECM and cannot be disabled. However, the added engine speed can be set within the following ranges: Minimum 0 RPM Maximum for automatic transmission 100 RPM Maximum for manual transmission 200 RPM Preset Value 0 RPM Vehicle Speed Sensing System Refer to Speed Calibration Programming. bulletin of 41 09/08/2005

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